P6 - Molecules And Matter 1️⃣✅ Flashcards
What is a plateau?
A horizontal part of a graph.
What is the equation for density?
density = mass/volume
What are the units of density?
kg/m3 or g/cm3
How do you work out volume?
length x width x height
How are particles positioned in a solid?
Particles are closely packed together and vibrate in fixed positions.
How are particles positioned in a liquid?
Particles slightly spread out, start to vibrate more and can flow or be poured.
How are particles positioned in a gas?
Particles are very far apart, vibrate much faster and move around quickly.
An object will float if an objects density is……..
lower than the density of the liquid it’s in.
What is sublimation?
The change of state between a solid and a gas.
What is boiling?
The change of state between a liquid and a gas, it only occurs when the temperature has reached or surpassed the boiling point of that substance.
What is evapouration?
The change of state between a liquid and a gas, it occurs at any temperature.
What is freezing?
The change of state between a liquid and a solid.
What is melting?
The change of state between a solid and a liquid.
What is condensation?
The change of state between a gas and a liquid.
What is internal energy?
The total potential and kinetic energy stored by the particles of a substance.
What is the equation for specific latent heat?
Energy = mass x specific latent heat.
What are the units of specific latent heat?
J/kg
What is specific heat capacity?
The amount of energy required to raise the temperature of 1kg of a substance by 1°C
What is specific latent heat?
the energy required to change the state of 1kg of a substance with no change in temperature
What is specific latent heat of fusion?
the energy required to change state from a solid to a liquid (melt) of 1kg of a substance with no change in temperature
What is specific heat of vaporisation?
the energy required to change state from a liquid to a vapour of 1kg of a substance with no change in temperature
What is the equation for specific heat capacity?
Energy = mass x specific heat capacity (c) x temp change
What is absolute zero?
The lowest temperature anything can be.
What temperature is absolute zero?
-273°C